dialogue

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A conversation between two or more people.
• noun A discussion of positions or beliefs, especially between groups to resolve a disagreement.
• noun Conversation between characters in a drama or narrative.
• noun The lines or passages in a script that are intended to be spoken.
• noun A literary work written in the form of a conversation.
• noun Music A composition or passage for two or more parts, suggestive of conversational interplay.
• intransitive verb To express as or in a dialogue.
• intransitive verb To engage in a dialogue.

from The Century Dictionary.

• noun A conversation between two or more persons; a colloquy; a talk together.
• noun Specifically
• noun A literary work in the form of an imaginary conversation or discussion — Used as the means of conveying views or opinions: as, the Dialogues of Plato.
• noun Used as part of a play to be acted, or to be spoken as a school exercise.
• To discourse together; converse; talk; confer.
• To express as in dialogue; put in the form of a dialogue.

from the GNU version of the Collaborative International Dictionary of English.

• noun A conversation between two or more persons; particularly, a formal conservation in theatrical performances or in scholastic exercises.
• noun A written composition in which two or more persons are represented as conversing or reasoning on some topic.
• transitive verb rare To express as in dialogue.
• intransitive verb rare To take part in a dialogue; to dialogize.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A conversation or other form of discourse between two or more individuals.
• noun In a dramatic or literary presentation, the verbal parts of the script or text; the verbalizations of the actors or characters.
• noun A literary form, where the presentation resembles a conversation.
• noun computing A dialogue box.
• verb informal, business To discuss or negotiate so that all parties can reach an understanding.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a conversation between two persons
• noun a discussion intended to produce an agreement
• noun a literary composition in the form of a conversation between two people
• noun the lines spoken by characters in drama or fiction